html {
    overflow-x: hidden;
    overflow-y: scroll;
    background: #ebf0f0;
    overflow-anchor: none;
}
/* 清除内外边距 */

body, h1, h2, h3, h4, h5, h6, hr, p, blockquote,
/* structural elements 结构元素 */

dl, dt, dd, ul, ol, li,
/* list elements 列表元素 */

pre,
/* text formatting elements 文本格式元素 */

fieldset, button, input, textarea, th, td {
    margin: 0;
    padding: 0;
}


/* 设置默认字体 */

body, button, input, select, textarea {
    color: #333;
    outline: none;
	font-family: -apple-system-font, "Helvetica Neue", Tahoma, "PingFang SC", "lantinghei sc", "Microsoft Yahei", sans-serif;
	font-size: 16px;
	line-height: 1.6;
	font-feature-settings: 'kern' 1;
	-webkit-font-smoothing: antialiased;
}

h1 {
    font-size: 20px;
    /* 18px / 12px = 1.5 */
}

h2 {
    font-size: 18px;
}

h3 {
    font-size: 16px;
}

h4, h5, h6 {
    font-size: 100%;
}

address, cite, dfn, em, var {
    font-style: normal;
}


/* 统一等宽字体 */

small {
    font-size: 12px;
}


/* 小于 12px 的中文很难阅读，让 small 正常化 */


/* 重置列表元素 */

ul, ol {
    list-style: none;
}


/* 重置文本格式元素 */

a {
    text-decoration: none;
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
}

a:hover {
    text-decoration: none;
}

abbr[title], acronym[title] {
    /* 注：1.ie6 不支持 abbr; 2.这里用了属性选择符，ie6 下无效果 */
    border-bottom: 1px dotted;
    cursor: help;
}

q:before, q:after {
    content: '';
}


/* 重置表单元素 */

legend {
    color: #000;
}


/* for ie6 */

fieldset, img {
    border: none;
}

/* 注：optgroup 无法扶正 */

button, input, select, textarea {
    font-size: 100%;
    /* 使得表单元素在 ie 下能继承字体大小 */
}


/* 重置表格元素 */

table {
    border-collapse: collapse;
    border-spacing: 0;
}


/* 重置 hr */

hr {
    border: none;
    height: 1px;
}

article, aside, canvas, figure, figure img, figcaption, hgroup, footer, header, nav, section, audio, video {
    position: relative;
    display: block;
}

nav ul, nav ol {
    list-style: none;
}

.hidden {
    display: none;
}

.clearfix {
    *zoom: 1;
}

.clearfix:before, .clearfix:after {
    display: table;
    content: "";
}

.clearfix:after {
    clear: both;
}
